| Paper: | SPCOM-P6.3 | ||
| Session: | Channel Estimation & Equalization I | ||
| Time: | Wednesday, May 17, 14:00 - 16:00 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing for Communication: MIMO precoder/decoder design, receiver algorithms | ||
| Title: | PRECONDITIONED AND RANK-FLEXIBLE BLOCK CONJUGATE GRADIENT IMPLEMENTATIONS OF MIMO WIENER DECISION FEEDBACK EQUALIZERS | ||
| Authors: | Ingmar Groh, German Aerospace Center (DLR), Germany; Guido Dietl, Wolfgang Utschick, Munich University of Technology (TUM), Germany | ||
| Abstract: | In this paper, we present two extensions of the Block Conjugate Gradient (BCG) algorithm, a method which exploits the concept of block Krylov subspaces. First, we extend the BCG algorithm such that it is more rank-flexible concerning the dimension of the block Krylov subspace. Second, a computationally efficient preconditioned BCG (PBCG) algorithm is introduced which turns out to outperform the standard BCG algorithm concerning the complexity-performance ratio. Hence, we provide a powerful implementation for reduced-rank signal processing in the Mean Square Error (MSE) sense. Simulation results show the gain in rank-flexibility and convergence velocity. | ||
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